Matrix 1S Brushless FC (3IN1/4IN1)

Matrix 1S Brushless FC (3IN1/4IN1)

Description:

The Matrix 1S Brushless Flight Controller redefines 1S whoop performance with two purpose-driven architectures: the 3IN1 for DJI O4 digital dominance (integrating FC, ESC, and ELRS 2.4G RX while omitting analog OSD), and the 4IN1 for analog mastery (adding built-in OSD + solder pads for external VTXs). Both feature the iconic cross-design architecture, newly developed BEC, 18A peak ESCs, and the STM32G473 MCU for 55% faster processing—delivering effortless setup, pro-tier control, and uncompromised flight dynamics that rewrite 1S standards.

Bullet Points

• Dual DNA: 3IN1 (FC, ESC, and ELRS 2.4G RX) for DJI O4 digital dominance (omits analog OSD), 4IN1 for analog mastery with OSD.
• STM32G473 MCU: 55% faster processing than F411 for responsive tuning.
• Stable Video Transmission: Features a newly developed BEC to ensure consistent power delivery for seamless HD performance.
• Enhanced Overcurrent Capacity: Supports 12A continuous current and 18A peak ESC, providing robust performance for demanding flights.
• Reliable Precision: Includes an independent 3.3V LDO design to deliver stable, interference-free power directly to the IMU for accurate control.
• Whoop-ready Installation: The 3IN1 is equipped with motor plugs and a SH1.0-6Pin HD digital port for a hassle-free installation and maintenance experience, while the 4IN1 has external VTX soldering pads for protocol flexibility.

Specifications:

FC

• MCU: STM32G473CEU6 (168MHz)
• Gyro: ICM42688P
• Blackbox Memory: 16MB
• Sensor: Voltage & current
• BEC: 5V/3A
• UART (3IN1 Version): UART 1 (RX Only/SBUS), UART 2 (Free), UART 3 (For RX), UART 4 (Free/HD MSP)
• UART (4IN1 Version): UART 1 (For VTX), UART 2 (Free), UART 3 (For RX), UART 4 (NONE)
• ESC: 12A continuous
• RX: Serial ELRS 2.4GHz (V3.4.3)
• FC Firmware: Betaflight_4.5.1_BETAFPVG473 (3IN1 version), Betaflight_4.5.2_BETAFPVG473_V2 (4IN1 version)
• USB Port: SH1.0-4Pin
• OSD: AT7456E (4IN1 version only)
• HD Digital VTX Port: SH1.0-6Pin (3IN1 version only)
• Motor Plug: JST1.25-3Pin
• Battery Connector: BT2.0
• Mounting Size: 25.5mm x 25.5mm
• Weight (3IN1 Version): 3.8±0.1g (battery connector excluded), 4.2±0.1g (battery connector included)
• Weight (4IN1 Version): 3.6±0.1g (battery connector excluded), 4.6±0.1g (battery connector included)

ESC

• Power Input: 1S only
• Current: 12A continuous, 18A peak
• ESC Firmware: A_X_5_96_v0.19.2.hex for BB51 Bluejay firmware
• Digital Signal Protocol: DSHOT300, DSHOT600

Diagram

Matrix 1S Brushless Flight Controller (3IN1):

Ultra-Resilient BEC

1S whoops often fly at voltages as low as 3.3V and digital image transmission requires higher current, placing significant demands on the BEC. To meet these challenges, an advanced BEC has been developed, capable of delivering over 3A of current at ultra-low voltages down to 2.85V. This ensures stable image transmission even in critical situations. While flying to such low voltages isn’t recommended, this innovation provides pilots with a greater chance of safely recovering from unexpected situations.

The 4IN1 version retains soldering pads for external analog VTX, giving you protocol freedom while reducing voltage ripple interference for cleaner video signals.

Serial ELRS 2.4G RX

Serial ELRS 2.4G RX uses the Crossfire serial protocol (CRSF protocol) to communicate between the receiver and the flight controller board. So the Serial ELRS 2.4G RX is available to support upgrading to ELRS V3.0 with no need to flash Betaflight flight controller firmware. Enter binding status by power on/off three times.

• Plugin and unplug the flight controller three times;
• Make sure the RX LED is doing a quick double blink, which indicates the receiver is in bind mode;
• Make sure the RF TX module or radio transmitter enters binding status, which sends out a binding pulse;
• If the receiver has a solid light, it’s bound.

The Serial ELRS 2.4G RX can be updated via Wi-Fi or Betaflight serial passthrough. Here is the way to update the Serial ELRS 2.4G RX firmware through passthrough.

• Plug in your FC to your computer, connect to ExpressLRS Configurator instead of Betaflight Configurator;
• Choose target “BETAFPV 2.4GHz AIO RX”;
• Flash using the BetaflightPassthrough option in ExpressLRS Configurator.

Package Include:

1x Matrix 1S Brushless FC (3IN1/4IN1)

Related Articles:

FPV Drone Tuning Rates and Filters: Betaflight PID Guide

Table of Contents What Is PID Control in FPV Drones? Betaflight PID Terms: P, I, D, F Explained...

Read More →

RC Transmitter Buying Guide India: FrSky vs RadioMaster 2026

RC Transmitter Buying Guide India: FrSky vs RadioMaster 2026 Choosing your first RC transmitter — or upgrading from...

Read More →

Drone Motor KV Rating Calculator and Selection Guide

Understanding the drone motor KV rating and how to calculate the right motor for your build is fundamental...

Read More →